linux: Fix build on Karmic

chrome/renderer/websharedworkerrepository_impl.h

Index: chrome/renderer/websharedworkerrepository_impl.h
diff --git a/chrome/renderer/websharedworkerrepository_impl.h b/chrome/renderer/websharedworkerrepository_impl.h
index bf6369c04866c8b0456d3f68f2ade6e4afe62823..a0cda6d0a713ed8b7b1b0beaaec46b7eaa2da66a 100644
--- a/chrome/renderer/websharedworkerrepository_impl.h
+++ b/chrome/renderer/websharedworkerrepository_impl.h
@@ -7,7 +7,9 @@
 
 #include "webkit/api/public/WebSharedWorkerRepository.h"
 
-class WebKit::WebSharedWorker;
+namespace WebKit {
+  class WebSharedWorker;
+}
 
 class WebSharedWorkerRepositoryImpl : public WebKit::WebSharedWorkerRepository {
     virtual WebKit::WebSharedWorker* lookup(const WebKit::WebURL& url,